YouTube Comment
Giveaway Picker

A cryptographic random seed is used for each giveaway and stored on the results page. Since the seed + comment list + algorithm are all public, the winner can be deterministically verified.

When a giveaway is completed, a unique link like /giveaway/results/[slug] is generated. This page shows winners, giveaway date, and participant count — the channel owner shares it, viewers verify it.

No limit. We can fetch all comments on a video using YouTube's commentThreads.list API (paginated).

Unique comment (one entry per person), subscriber requirement, minimum comment length, like count (most liked comments). All optional.

No — with the unique filter enabled, the same user cannot win more than once. If the filter is disabled, it's possible.

Yes, all your giveaways are listed on the /tools/giveaway page. Public results pages are permanent.